Cogent Communications Holdings Inc. specializes in providing businesses with high speed Internet access, Ethernet transport, and colocation services. It offers on-net Internet access services to bandwidth-intensive users and on-net services in carrier-neutral co-location facilities, company controlled data centers, and single-tenant office buildings. In addition, it offers off-net services to businesses that are connected to its network primarily by means of 'last mile' access service lines obtained from other carriers primarily in the form of point-to-point carrier Ethernet, TDM, POS, SDH, and/or carrier Ethernet circuits. Cogent Communications Holdings Inc., formerly known as Cogent Communications Group, Inc., is headquartered in Washington, the District of Columbia.